Chemical Process MCQs

Question 1

Calgon used in water treatment is chemically

Accepted Answer

Sodium hexametaphosphate

Answer

Sodium phosphate

Answer

Calcium phosphate

Answer

Tricresyl phosphate

Question 2

The main use of activated carbon in water treatment is to control

Accepted Answer

Taste and odour

Answer

Bacterial growth

Answer

Turbidity

Answer

None of these

Question 3

Type of glass used in optical work is the __________ glass.

Accepted Answer

Lead

Answer

Soda-lime

Answer

Fibre

Answer

Borosilicate

Question 4

The most economical pulp for the production of newsprint would be the __________ pulp.

Accepted Answer

Groundwood

Answer

Sulphate

Answer

Sulphite

Answer

Semichemical

Question 5

Solvay process as compared to dual process (i.e. modified Solvay process)

Accepted Answer

Both B and C

Answer

Can use low grade brine

Answer

Has less corrosion problems

Answer

Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl

Question 6

Pick out the wrong statement.

Accepted Answer

Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Answer

Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action

Answer

Soap powder is prepared by mixing soap with hydrated sodium carbonate

Answer

Detergents differ from soaps in their action in hard water

Question 7

Cumene (isopropyl benzene) is made by

Accepted Answer

Propylene alkylation of benzene

Answer

Oxidation of napthalene

Answer

Polymerisation of a mixture of benzene & propylene

Answer

None of these

Question 8

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.

Accepted Answer

Brine and coal

Answer

Coke and sand

Answer

Coke and caustic soda

Answer

None of these

Question 9

The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.

Accepted Answer

Endothermic

Answer

Exothermic

Answer

Catalytic

Answer

Autocatalytic